OF AUSTRALIA. 89 
scales of the body are rather large ; they are covered with 
very faint concentric lines, and their edge is entire ; they number 
thirty -five on the longitudinal line, and ten on the transverse 
one. 
Two dorsal fins, the first inserted at an equal distance from 
the snout and the base of the caudal,, formed of one strong 
arched spine, and of five rather filamentary rays. The second 
dorsal is separated from the first by a space equal to the 
diameter of the eye ; it is formed of one long arched spine, 
and of nine rays ; the two last extend as filaments over the 
tail ; caudal rather bifurcated, of sixteen long rays and several 
shorter ones on each side ; anal very long, beginning rather in 
front of the first dorsal, and formed of one long arched spine, 
and of seventeen rays • the height of these go increasing as 
they are placed backwards, and the last are rather pro 
longated. 
The ventrals are placed very near one another, at a con- 
siderable distance behind the pectorals, and are formed of a 
slender spine and of five rays ; the pectorals have thirteen 
rays. 
The general colour, after having been in spirits, is silvery, 
with the back of a light lilac ; a rather broad straight longitu- 
dinal stripe runs from behind the eye to the extremity of the 
caudal ; it is silvery, bordered with black ; the rays of the 
dorsal and the end of those of the anal are obscure. Two 
inches long. 
Port Darwin. 
.POMACENTEUS BILINEATUS. 
This sort has to be placed in the section characterised by 
" Body without cross-bands ■ its height is more than one-third 
of the total length; blue lines along the nape and the 
forehead." • 
It comes near Unilineatus of Cuv. and Valen.; but is easily 
distinguished from Ruppel's figure (Biocellatus N.W. fish., pi. 
31, fig. 3) by the form of the caudal, which is rounded and 
rather prolongated in its centre in mine, and strongly emar- 
ginated in the other. The general form of mine is also much 
